JP2005225175A - Printing device with electric power saving mode - Google Patents

Printing device with electric power saving mode Download PDF

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Publication number
JP2005225175A
JP2005225175A JP2004038128A JP2004038128A JP2005225175A JP 2005225175 A JP2005225175 A JP 2005225175A JP 2004038128 A JP2004038128 A JP 2004038128A JP 2004038128 A JP2004038128 A JP 2004038128A JP 2005225175 A JP2005225175 A JP 2005225175A
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JP
Japan
Prior art keywords
power saving
saving mode
expansion
expansion board
board
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JP2004038128A
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Japanese (ja)
Inventor
Makoto Hinohara
誠 日野原
Original Assignee
Canon Inc
キヤノン株式会社
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Priority to JP2004038128A priority Critical patent/JP2005225175A/en
Publication of JP2005225175A publication Critical patent/JP2005225175A/en
Withdrawn legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To automatically identify a usable expansion board in a printing apparatus having an expansion slot and corresponding to a power saving mode, and in case of an unusable board, erroneously shifts to a power saving mode as a warning to a user. prevent.
An expansion slot IF includes a first bus that realizes an expansion function, a second bus that communicates the type of the expansion card, and whether or not the power saving mode is supported. The expansion card is mounted with an EEPROM that stores the type and presence / absence of correspondence to the power saving mode. When the printer is turned on, data indicating the expansion card type and power saving mode support is acquired via the second bus, and the printer determines whether to enter the power saving mode according to the data. To do.
[Selection] Figure 1

Description

  The present invention relates to a printing apparatus having a power saving mode, including an expansion slot into which an expansion board that supports or does not support the power saving mode may be inserted.

Conventionally, some printing apparatuses have an expansion slot, and a host I / F or a storage device can be detachably expanded in a form called an expansion board. In general, the expansion slot of such a device allows a user to arbitrarily connect a plurality of types of expansion boards to the expansion slot. In order to support such multiple types of expansion boards, firmware corresponding to the expansion boards such as the host I / F and storage device is stored in advance in the ROM in the printing apparatus main body, and the firmware is switched as necessary. It is possible to use it, update firmware, and update firmware as necessary. A printing apparatus compatible with the power saving mode has a mechanism that supplies necessary power to each unit when printing, but does not supply unnecessary power to each unit when printing is not performed. In the following Patent Document 1, in an image forming apparatus capable of extending a function by adding a plurality of expansion elements to a predetermined function, the power supply to the expansion element is controlled and specified among the plurality of expansion elements. A control means for supplying power only to the minimum expansion element necessary for performing the operation is disclosed. Also, in Patent Document 2, when a processing request is received from another device connected via a card device, when the device is in a power saving mode, the control unit starts the printer initial operation, and the communication unit causes the host device to When the request information is transmitted and a request other than the print request is received, the control unit does not activate the printer initial operation even if the device is in the power saving mode, and the communication unit transmits the request information to the host device. Is disclosed.
JP-A-8-286572 JP 2001-322336 A

  However, the conventional technology assumes that the expansion board (element) is compatible with the power saving mode. Therefore, if the expansion board does not necessarily have the power saving mode, carelessly supplying power. When an expansion board that supports power saving mode when it is stopped or stopped, even if it returns from power saving mode and power is supplied, the initial processing is not performed correctly and operation cannot be started, or the current flows to the element during power saving mode. May occur, causing unnecessary power consumption and device destruction.

  However, the above patent document is an invention for each unit and expansion card corresponding to the power saving mode and does not consider an expansion board that does not have the power saving mode.

  The present invention has been made paying attention to the above problems, and an object of the present invention is to propose a printing apparatus characterized by safely shifting to a power saving mode regardless of whether the power saving mode is supported or not. It is said.

  In order to solve the above problems, the present invention shown in the first embodiment includes an expansion board having an expansion slot in the printing apparatus, a removable expansion board, an expansion slot controller for controlling the expansion slot, and an expansion board connected to the expansion slot controller. Whether the first interface that performs data communication for realizing the function and the expansion board corresponds to the power saving mode or not, the second interface that communicates whether or not the expansion board corresponds to the power saving mode is stored. Means for acquiring data indicating whether or not the power saving mode is supported through the second interface when the printing apparatus is turned on, and means for detecting whether the expansion board is inserted into or removed from the expansion slot. Expanded based on data indicating whether or not to support the power saving mode obtained when the printer was turned on Lot controller and determines whether to shift the printing apparatus according to the corresponding / non-correspondence to the power saving mode of the expansion board in the power saving mode.

  In order to solve the above-mentioned problem, the present invention shown in the second embodiment includes an expansion board having an expansion slot in the printing apparatus, a detachable expansion board, an expansion slot controller for controlling the expansion slot, and an expansion board connected to the expansion slot controller. Whether the first interface that performs data communication for realizing the function and the expansion board corresponds to the power saving mode or not, the second interface that communicates whether or not the expansion board corresponds to the power saving mode is stored. Means for acquiring data indicating whether or not the power saving mode is supported through the second interface when the printing apparatus is turned on, and means for detecting whether the expansion board is inserted into or removed from the expansion slot. Expanded based on data indicating whether or not to support the power saving mode obtained when the printer was turned on Lot controller if non-compliant expansion boards to the power saving mode, prohibits the use of expansion boards disconnect first half of the bus, and wherein the shifting only to the power saving mode body.

  In order to solve the above-mentioned problem, the present invention shown in the third embodiment includes an expansion board having an expansion slot in the printing apparatus, a removable expansion board, an expansion slot controller for controlling the expansion slot, and an expansion board connected to the expansion slot controller. Whether the first interface that performs data communication for realizing the function and the expansion board corresponds to the power saving mode or not, the second interface that communicates whether or not the expansion board corresponds to the power saving mode is stored. Means for acquiring data indicating whether or not the power saving mode is supported through the second interface when the printing apparatus is turned on, and means for detecting whether the expansion board is inserted into or removed from the expansion slot. Expanded based on data indicating whether or not to support the power saving mode obtained when the printer was turned on Lot controller is characterized by expansion board if non-compliant to the power saving mode, expansion boards disconnect first half of the bus to shift the normal mode, the main body to the power saving mode.

[Action]
According to the present invention shown in the first embodiment, by acquiring data indicating whether or not the power saving mode provided in advance on the expansion board is supported, a plurality of data can be obtained regardless of whether the power saving mode is supported or not. The expansion board can be inserted into the printing apparatus, and the expansion board can be added or replaced without the user's consciousness, thereby enabling stable operation of the printing apparatus.

  According to the present invention shown in the second embodiment, by acquiring data indicating whether or not the power saving mode provided in advance in the expansion board is supported, the expansion board that is incompatible with the power saving mode by the user by mistake is acquired. Even if the printer is inserted into the printing apparatus, a printing apparatus that can reliably shift to the power saving mode is possible.

  According to the present invention shown in the third embodiment, by acquiring data indicating whether or not the power saving mode provided in advance in the expansion board is supported, a plurality of data can be obtained regardless of whether the power saving mode is supported or not. The expansion board can be inserted into the printing apparatus, and only the part corresponding to the power saving mode is shifted to the power saving mode without being conscious of the user, so that the printing apparatus corresponding to the power saving can be stably realized.

  According to the printing apparatus having the power saving mode of the present invention, even if the expansion board is not necessarily limited to the one having the power saving mode, the power is not carelessly supplied or not. Therefore, even when an expansion board that does not have a power saving mode is inserted, even if it returns from the power saving mode and power is supplied, the initial processing is not performed correctly and operation does not start, or current flows into the element during the power saving mode. Will not cause unnecessary power consumption or device destruction.

  As disclosed in Japanese Patent Laid-Open No. 8-286572 and Japanese Patent Laid-Open No. 2001-322336, the invention for each part and expansion card corresponding to the power saving mode is different from the case where no consideration is given to the expansion board not having the power saving mode. It is possible to provide a printing apparatus characterized in that the expansion board can safely shift to the power saving mode regardless of whether or not the expansion board supports the power saving mode. In addition, since only the portion corresponding to the power saving mode is shifted to the power saving mode without being conscious of the user, the user can use it with peace of mind. Furthermore, an expansion board that does not support the power saving mode can also be used, thereby expanding the range of expansion.

  The best mode for carrying out the present invention will be described below based on examples.

  The first embodiment of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is a block diagram showing a basic configuration for carrying out the present invention. As shown in FIG. 1, a printer 3 is connected to a host computer (hereinafter referred to as a host) 1. An operating system (hereinafter referred to as OS) 7 and an application program (hereinafter referred to as application) 5 are installed in the host 1. A printer driver 9 is installed in the OS 7.

  The printer driver 9 generates print data corresponding to a drawing command from the application 5 in a data format that the printer 3 can understand. Generally, the printer driver 9 is manufactured by the manufacturer of the printer 3 and provided to the user together with the printer 3. Is installed in the OS7.

  The host 1 and the printer 3 are connected via a bidirectional communication interface 11 (hereinafter referred to as Centronics).

  The printer 3 includes a print engine 13 including a mechanism necessary for printing such as a head driving mechanism and a paper supply / conveyance mechanism, and a controller 15 that processes print data from the host 1 and controls the print engine. The controller 15 is similar to that of a general printer, and includes a first host I / F 17 for communicating with the host 1, a CPU 19 for processing print data received from the host 1, and a program necessary for the operation of the CPU 19. , A flash ROM 33 that stores an operation program for the CPU 19 and an operation program for an expansion board inserted in an expansion slot, a RAM 23 that is used as a main memory, work area, reception buffer, page memory, print buffer, etc. An EEPROM 25 for holding the current status of the set printer 3, a character generator (hereinafter referred to as CG) 27 holding font data, an engine interface 29 for communication with the printer engine 13, and an expansion board 30 Store And a expansion slot 31 or the like fit.

  The expansion slot 31 is provided with a function for transmitting / receiving data by communicating with the expansion board to realize the function of the expansion board, a detection function for identifying the presence / absence of the expansion board, and the support / non-support for the power saving mode. The state of the expansion slot 31 can be easily determined by a method described later.

  The expansion slot 31 can supply power to the expansion board 30. The power supply 32 supplies power to each element in the printer 3. The CPU 19 can control the output of the power supply 32 and supplies and stops power to each element of the printing apparatus 3. The panel 35 is a liquid crystal display device in this embodiment, and can display the status of the printer 3 by a character string or display corresponding to / not corresponding to the type of expansion board and the power saving mode by a method described later. The method will be described with reference to FIG.

  FIG. 2 is a block diagram when the expansion interface board 30 is connected to the expansion slot 31. Reference numeral 41 denotes an expansion slot controller that transmits and receives data through the expansion board controller 46 in the expansion board 30 and the first expansion interface 47 in accordance with instructions from the CPU 19. Further, the expansion slot controller 41 receives data indicating whether the power saving mode is supported and the type data through the EEPROM 50 on the expansion board 30 and the second expansion interface 49.

The first extension interface of the present embodiment uses a 33 MHz PCI bus, and the second extension interface uses a 100 kHz I 2 C bus. Further, the expansion slot controller 41 has a function of controlling whether or not power is supplied to the expansion board 30. The switch circuit 51 is controlled by a command from the CPU 19 to determine whether or not to supply the power source 52a to the power source 52b. be able to. 52a is a power source that is always supplied with power from the power source 32, and 52b is a power source that stops power from the power source 32 in the power saving mode. Whether or not power is supplied is a mechanism that allows the external controller to control the external output port by writing data in an internal register (not shown) of the expansion slot controller 41.

  In the EEPROM 50, data indicating whether or not the power saving mode for each expansion board is supported and type data are stored in advance as digital values. As for the data, predetermined data is written when the power saving mode is supported. However, when the power saving mode is not supported, the EEPROM 50 itself does not exist and the data cannot be read. Data other than the written data has been written.

  The EEPROM 50 is connected to a power source 52a and is always supplied with power. Reference numeral 42 denotes an expansion board detection terminal which is connected to the expansion board terminal 43 on the expansion board 30 and detects the presence or absence of the expansion board 30. In this embodiment, the expansion board 30 is not connected when the expansion board detection terminal is at the high level, and is connected when it is at the low level. Further, when there is no response in communication between the expansion slot controller 41 and the expansion board controller 46, it may be determined that there is no expansion board. The expansion board controller 46 has a function of transmitting / receiving data to / from the host interface controller 45 and a function of transmitting a program (firmware) in the ROM 44 to the expansion slot controller 41. A host interface controller 45 transmits and receives data to and from the host through the host interface 48.

  FIG. 3 is a flowchart when the printer 3 switches from the normal mode to the power saving mode executed by the CPU 19 in a state where the multiple types of expansion boards can operate stably regardless of whether the power saving mode is supported or not. .

  When the power is turned on (step S1), the CPU 19 acquires the state of the expansion board detection terminal 42 through the expansion slot controller 41 and confirms the presence or absence of the expansion board. Next, when it is determined that there is nothing in the presence / absence check of the expansion board, the process proceeds to step S3, and when it is determined that there is an expansion board, the process proceeds to step S5 (step S2). When it is determined that there is no expansion board and the process proceeds to step S3, the CPU 19 stores power saving mode compatible data in an internal register (not shown) of the expansion slot controller 41 (step S3). Further, the CPU 19 displays “no expansion board” on the panel 33 (step S4). When it is determined that there is an expansion board and the process proceeds to step S5, the CPU 19 accesses the EEPROM 50 from the second expansion interface 49 through the expansion slot controller 41 to acquire the power saving mode supportability data and type of the expansion board 30. Also at this time, the CPU 19 stores power saving mode enabled / disabled data and type data and type data in an internal register (not shown) of the expansion slot controller 41 (step S5).

  Further, the CPU 19 displays “xxx extension board” on the panel 35 as the extension board name corresponding to the extension board type data. In xxx, for example, a name corresponding to the type of expansion board such as IEEE1394 is entered. Further, “power saving mode supported” or “power saving mode not supported” is displayed on the panel 35 according to the power saving mode supportability data of the expansion board 30 (step S6).

  The operations so far are performed from when the power is turned on until the first print job is received. Next, it is detected whether or not the printer 3 enters a power saving mode. The transition to the normal power saving mode is performed after a predetermined time has elapsed since the print job from the host computer 1 does not come to the printer 3 (step S7). When it is possible to enter the power saving mode, the CPU 19 reads data indicating whether or not the power saving mode can be supported from an internal register (not shown) of the expansion slot controller 41. If the data can be supported, the CPU 19 proceeds to step S9. The printer 3 ends in the normal mode (step S8).

  Next, the CPU 19 stops communication performed using the first extension interface 47 and puts the first extension interface 47 into a high impedance state. Further, by writing data to an internal register (not shown) of the expansion slot controller 41, the switch 51 is turned off and the power supply to the expansion board 30 is cut off. Then, the display of the power saving mode is displayed on the panel 35, and the printer 3 is shifted to the power saving mode (step S9).

(Second Embodiment)
In the first embodiment, the CPU 19 accesses the EEPROM 50 through the expansion slot controller 41 to acquire data indicating whether or not the expansion board 30 can support the power saving mode. In the case of correspondence failure, the operation was performed in the normal mode. However, in the case of correspondence failure, the use of the expansion board may be restricted.

  The second embodiment will be described with reference to a flowchart for switching from the normal mode to the power saving mode executed by the CPU 19 of FIG. The block diagram showing the basic configuration is the same as FIG. 1, and the block diagram when the expansion interface board 30 is connected to the expansion slot 31 is the same as FIG.

  When the power is turned on (step S11), the CPU 19 acquires the state of the expansion board detection terminal 42 through the expansion slot controller 41 and confirms the presence or absence of the expansion board. If it is determined that there is no expansion board, the process proceeds to step S13. If it is determined that there is an expansion board, the process proceeds to step S15 (step S12).

  If it is determined that there is no expansion board and the process proceeds to step S13, the CPU 19 stores power saving mode compatible data in an internal register (not shown) of the expansion slot controller 41 (step S13). Further, the CPU 19 displays “no expansion board” on the panel 35 (step S14).

  When it is determined that there is an expansion board and the process proceeds to step S15, the CPU 19 accesses the EEPROM 50 from the second expansion interface 49 through the expansion slot controller 41 to obtain the power saving mode supportability data and type of the expansion board 30. Also at this time, the CPU 19 stores power saving mode enabled / disabled data and type data and type data in an internal register (not shown) of the expansion slot controller 41 (step S15). Further, the CPU 19 displays “xxx expansion board” on the panel 35 as the expansion board name corresponding to the type data of the expansion board. In xxx, for example, a name corresponding to the type of expansion board such as IEEE1394 is entered. Next, the CPU 19 reads data indicating whether or not the power saving mode can be supported from an internal register (not shown) of the expansion slot controller 41. If it can be supported, the process proceeds to step S17. If not, the process proceeds to step S18 (step S18). S16).

  In step 18, the CPU 19 stops communication performed using the first extension interface 47, and puts the first extension interface 47 into a high impedance state. Further, by writing data to an internal register (not shown) of the expansion slot controller 41, the switch 51 is turned off and the power supply to the expansion board 30 is cut off (step S18). Then, “power saving mode not supported” and “extension board unusable” are displayed on the panel 33 (step S19). In step S17, “power saving mode compatible” is displayed on the panel 35 (step S17). The operations so far are performed from when the power is turned on until the first print job is received. Next, it is detected whether or not the printer 3 enters a power saving mode. The transition to the normal power saving mode is performed after a predetermined time has elapsed since the print job from the host computer 1 does not come to the printer 3 (step S20). Then, the display of the power saving mode is displayed on the panel 35, and the printer 3 is shifted to the power saving mode (step S21).

(Third embodiment)
In the first embodiment, the CPU 19 accesses the EEPROM 50 through the expansion slot controller 41 to acquire data indicating whether or not the expansion board 30 can support the power saving mode. In the second embodiment, if the expansion board 30 is not compatible with the power saving mode, the use of the expansion board is restricted and the printer 3 is set to the power saving mode. However, if the expansion board 30 is not compatible with the power saving mode, the expansion board 30 may be shifted to the normal mode, and the printer 3 may be shifted to the power saving mode. The third embodiment will be described with reference to a flowchart for switching from the normal mode to the power saving mode executed by the CPU 19 of FIG. The block diagram showing the basic configuration is the same as FIG. 1, and the block diagram when the expansion interface board 30 is connected to the expansion slot 31 is the same as FIG.

  When the power is turned on (step S31), the CPU 19 acquires the state of the expansion board detection terminal 42 through the expansion slot controller 41 and confirms the presence or absence of the expansion board. If it is determined that there is no expansion board, the process proceeds to step S33. If it is determined that there is an expansion board, the process proceeds to step S35 (step S32). If it is determined that there is no expansion board and the process proceeds to step S33, the CPU 19 stores power saving mode compatible data in an internal register (not shown) of the expansion slot controller 41 (step S33). Further, the CPU 19 displays “no expansion board” on the panel 35 (step S34). When it is determined that there is an expansion board and the process proceeds to step S35, the CPU 19 accesses the EEPROM 50 from the second expansion interface 49 through the expansion slot controller 41 to acquire the power saving mode supportability data and type of the expansion board 30. Also at this time, the CPU 19 stores power saving mode compatible data or not data and type data in an internal register (not shown) of the expansion slot controller 41 (step S35).

  Further, the CPU 19 displays “xxx extension board” on the panel 35 as the extension board name corresponding to the extension board type data. In xxx, for example, a name corresponding to the type of expansion board such as IEEE1394 is entered. Further, “power saving mode supported” or “power saving mode not supported” is displayed on the panel 33 according to the power saving mode support data of the expansion board 30 (step S36). The operations so far are performed after the power is turned on until the first print job is received. Next, it is detected whether or not the printer 3 enters a power saving mode. The transition to the normal power saving mode is performed after a predetermined time has elapsed since the print job from the host computer 1 does not come to the printer 3 (step S37). When it is possible to enter the power saving mode, the CPU 19 reads data indicating whether or not the power saving mode can be supported from an internal register (not shown) of the expansion slot controller 41. If the data can be supported, the CPU 19 proceeds to step S39. Advances to step S40 (step S38).

  When the expansion board is compatible with the power saving mode, the CPU 19 stops the communication performed using the first expansion interface 47 and puts the first expansion interface 47 into a high impedance state. Further, by writing data to an internal register (not shown) of the expansion slot controller 41, the switch 51 is turned OFF, the supply of power to the expansion board 30 is stopped, and the expansion board 30 is shifted to the power saving mode. Then, the display of the power saving mode is displayed on the panel 33, and the printer 3 is shifted to the power saving mode (step S39). When the expansion board is not compatible with the power saving mode, the CPU 19 stops the communication performed using the first expansion interface 47 and puts the first expansion interface 47 into a high impedance state (step S40). Then, “not supported by extension board power saving mode” is displayed on the panel 35 (step S41). Then, the display of the power saving mode is displayed on the panel 35, and the printer 3 is shifted to the power saving mode (step S42).

The block diagram which shows the basic composition for implementing this invention Block diagram when the expansion interface board is connected to the expansion slot 31 In the printer 3, a flowchart for switching from the normal mode executed by the CPU 19 to the power saving mode in a state in which multiple types of expansion boards can stably operate regardless of whether or not the power saving mode is supported. In the second embodiment, a flowchart for switching from the normal mode executed by the CPU 19 to the power saving mode. In the third embodiment, a flowchart for switching from the normal mode executed by the CPU 19 to the power saving mode.

Explanation of symbols

1 Host computer (host)
3 Printer (printing device)
5 Application 7 Operating System (OS)
9 Printer Driver 11 Bidirectional Interface 13 Printer Engine 15 Controller 17 First Host I / F
19 CPU
21 ROM
23 RAM
25 EEPROM
29 Engine I / F
30 Expansion board 31 Expansion slot 32 Power supply 33 Flash ROM
35 Panel 41 Expansion slot controller 42 Expansion board detection terminal 43 Expansion board terminal 44 ROM
45 Host interface controller 46 Expansion board controller 47 First expansion interface 48 Host interface 49 Second expansion interface 50 EEPROM
51 Switch circuit 52 Power supply

Claims (8)

  1.   Data indicating whether or not the controller and expansion board that controls the expansion slot support the power saving mode in a printing device that has a function expansion and power saving mode by inserting a removable expansion board into the expansion slot. A printing apparatus having a power saving mode, wherein the printing apparatus includes a storage unit that stores data and determines whether to shift to the power saving mode according to data indicating whether or not the power saving mode is supported.
  2.   Data indicating whether or not the controller and expansion board that controls the expansion slot support the power saving mode in a printing device that has a function expansion and power saving mode by inserting a removable expansion board into the expansion slot. A printing apparatus having a power saving mode, characterized in that when the expansion board not supporting the power saving mode is inserted into an expansion slot, the power saving mode is not entered.
  3.   Data indicating whether or not the controller and expansion board that controls the expansion slot support the power saving mode in a printing device that has a function expansion and power saving mode by inserting a removable expansion board into the expansion slot. Storage means for storing the information, and when an expansion board not compatible with the power saving mode is inserted into the expansion slot, the use of the expansion board is restricted, and only the printing apparatus main body is shifted to the power saving mode. A printing device with a power saving mode.
  4.   Data indicating whether or not the controller and expansion board that controls the expansion slot support the power saving mode in a printing device that has a function expansion and power saving mode by inserting a removable expansion board into the expansion slot. And when the expansion board that does not support the power saving mode is inserted into the expansion slot, the expansion board shifts to the normal operation mode and only the printer main body to the power saving mode. A printer with a power saving mode.
  5.   By inserting a removable expansion board into the expansion slot, the first interface, the second interface, the controller for controlling the expansion board, and the expansion board are in the power saving mode. Storage means for storing data indicating whether or not the expansion board is compatible, and the controller obtains data indicating whether or not the expansion board supports the power saving mode through the second interface, and according to the data And determining whether to shift to the power saving mode.
  6.   6. The printing apparatus having a power saving mode according to claim 5, wherein the storage means uses a power source to which power is supplied even in the power saving mode of the printing apparatus.
  7.   6. The power saving according to claim 1, wherein the timing for confirming whether or not the expansion board supports the power saving mode is performed from when the printing apparatus is turned on until the first print job is received. Printer with mode.
  8.   6. The storage location of the storage means that has an expansion slot and stores data indicating whether or not the expansion board is compatible with a power saving mode is an expansion board. Printer with power saving mode.
JP2004038128A 2004-02-16 2004-02-16 Printing device with electric power saving mode Withdrawn JP2005225175A (en)

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JP2004038128A JP2005225175A (en) 2004-02-16 2004-02-16 Printing device with electric power saving mode

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JP2004038128A Withdrawn JP2005225175A (en) 2004-02-16 2004-02-16 Printing device with electric power saving mode

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009065408A (en) * 2007-09-06 2009-03-26 Konica Minolta Business Technologies Inc Image forming apparatus, and power consumption management system
US8651601B2 (en) 2011-01-31 2014-02-18 Canon Kabushiki Kaisha Printing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009065408A (en) * 2007-09-06 2009-03-26 Konica Minolta Business Technologies Inc Image forming apparatus, and power consumption management system
US8651601B2 (en) 2011-01-31 2014-02-18 Canon Kabushiki Kaisha Printing apparatus

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